EXTRAIFACEOPTIONS

Usually someone who uses vlans also wants to do some other
manipulations with the ip stack or interface.
vlan-raw-devicedevicename
Indicates the device to create the vlan on. This is ignored
when the devicename is part of the vlan interface name.
ip-proxy-arp0|1
Turn proxy-arp off or on for this specific interface. This also
works on plain ethernet like devices.
ip-rp-filter0|1|2
Set the return path filter for this specific interface. This
also works on plain ethernet like devices.
hw-mac-addressmac-address
This sets the mac address of the interface before bringing it
up. This works on any device that allows setting the hardware
address with the ip command.